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The psychedelic drug 5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT) profoundly alters brain activity. This study reveals how 5-MeO-DMT reorganizes neural networks, impacting consciousness and brain dynamics.

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Area of Science:

  • Neuroscience
  • Psychopharmacology
  • Computational Psychiatry

Background:

  • 5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT) is a potent psychedelic.
  • Its effects on human brain dynamics are not well understood.
  • Previous research in rodents suggests alterations in brain oscillations.

Purpose of the Study:

  • To investigate the effects of 5-MeO-DMT on human electroencephalography (EEG) data.
  • To characterize the spatiotemporal organization of neural activity under 5-MeO-DMT.
  • To understand the neurobiological mechanisms underlying 5-MeO-DMT's subjective effects.

Main Methods:

  • Collected EEG data from 29 healthy individuals before and after inhaling 12 mg of vaporized 5-MeO-DMT.
  • Analyzed low-frequency oscillations and spatiotemporal field dynamics.
  • Examined broadband activity and global brain state transitions.

Main Results:

  • 5-MeO-DMT amplified low-frequency oscillations, consistent with rodent studies.
  • Neural activity patterns became heterogeneous, viscous, and nonrecurring.
  • Cortical slow-wave propagation was disrupted, and broadband activity showed more stable, low-dimensional behavior.

Conclusions:

  • 5-MeO-DMT radically reorganizes human brain dynamics, particularly low-frequency cortical activity.
  • These findings offer insights into the neurophysiological basis of psychedelic experiences.
  • The study provides a detailed empirical account of 5-MeO-DMT's impact on brain function.